292 



THE CROSSING OF FLOWERS. 



2 



Fig. 284. Types of the 13th, 14th, 15th, 16th, 18th, and 20th classes of the Linnean System. 



i, 2 Tilia, whole flower and section of same. 3 Anemone nemorosa. *, 5 Calotharnnus, whole flower and section of same, 

 e Antirrhinum, upper lip of corolla showing stamens. * Cardamine pratensis. 8 The same flower, the petals removed. 

 9 Tamarindus. 10 Adansonia. Aristolochia Clematitis. 12 The same flower after removal of the perianth. 

 6 > 9 10 n natural size ; the others somewhat magnified. 



